Jiujian Liu

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Shenzhen, CN

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Patents Grantslast 30 patents

Information Patent Grant
Multifunctional sounding device
- Patent number 12,267,658
- Issue date Apr 1, 2025
- AAC Technologies (Nanjing) Co., Ltd.
- Yao Hui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Speaker box
- Patent number 12,238,474
- Issue date Feb 25, 2025
- AAC Technologies Pte. Ltd.
- Yao Hui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dual magnetic circuits structure and sound device
- Patent number 11,765,513
- Issue date Sep 19, 2023
- AAC Microtech (Changzhou) Co., Ltd.
- Jiujian Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
MULTIFUNCTIONAL SOUNDING DEVICE
- Publication number 20240089661
- Publication date Mar 14, 2024
- AAC TECHNOLOGIES (NANJING) CO., LTD.
- Yao Hui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SPEAKER BOX
- Publication number 20240056728
- Publication date Feb 15, 2024
- AAC Technologies Pte. Ltd.
- Yao Hui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DUAL MAGNETIC CIRCUITS STRUCTURE AND SOUND DEVICE
- Publication number 20220210566
- Publication date Jun 30, 2022
- AAC Microtech (Changzhou) Co., Ltd.
- Jiujian Liu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE